Which one of the following statements with regard to the Preamble to the Constitution of India is not correct?

1. AThe term ‗Secular Democratic Republic‘ was not there in the Preamble originally.
2. BThe Preamble contains the basic structure of the Constitution of India.
3. CBy itself, the Preamble is not enforceable in a court of law.
4. DThe Supreme Court has held that the Preamble cannot be considered as an aid to the legal interpretation of the Constitution, where the language is ambiguous.